Is an grizzly bear an carnivore herbivore or an omnivore?

Answer 1

Well, they're not herbivores.

They're in order Carnivora and are perfectly capable of eating meat, but they do eat plants (and in some places plants may even form the majority of their diet), making them omnivores.

Answer 2

Grizzly bears are omnivores. Their diet contains salmon, nuts, fruits, leaves, roots, fungi, insects, rodents, sheep, elk, etc. They eat what's available depending on the season.